Question about Maytag MSD2456G Side by Side Refrigerator

1 Answer

Freezer not defrosting

This is the second time I've had to manually defrost my freezer in 4 months. What could be coasing that. Is there a deforsting circuit or a defrost module that may need to be replaced. How do I determine this. Once I deforst it it seems to work fine.

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  • mazzop Jan 22, 2008

    Hello and thank you for your quick reply.
    I did have an ohm meter, with some trial and searching on the Internet I Think I've been able to determine that I have a faulty defrost termination thermostat, some kind of a timer switch which turns on and of periodically to defrost the coil. When removed this harness from the freezer I tested the thermostat. I could not get any reading on the ohm meter, I should have been getting a "0" reading, as per the suggestion on the Internet, but all I could get was OL. Which tells me that I didn't have any continuity through it. I will be trying to purchase this harness this Monday, I hope that's the answer. If not I will have to try something else.... If all fails I will call the Maytag man...although he must be busier these days ...they don't build them like they used to.
    Below I have attached some links I used as referance.
    Thanks

    Mario Azzopardi

    http://www.appliance411.com/faq/defrostp...

    http://www.partselect.com/refrigerator+t...

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What is the entire Model # and I can help with some troubleshooting as long as you have a volt-ohm meter and an amprobe would be helpful.

Posted on Jan 19, 2008

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The refrigerator/freezer defrost system can be checked by manually initiating a defrost cycle. There
are two methods of initiating the ADC Test Mode.
First Test Method:
1. Turn the thermostat off for 15 seconds.
2. Turn the thermostat on for 5 seconds.
3. Turn the thermostat off for 15 seconds.
4. Turn the thermostat on for 5 seconds.
5. Turn the thermostat off for 15 seconds.
6. Turn the thermostat on for 5 seconds.
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In 3 to 8 seconds the ADC should turn on the defrost heater (with the bimetal closed). NOTE: The test mode will terminate when the bimetal opens. If the refrigerator/freezer is already in defrost, Test Mode can be terminated by unplugging the refrigerator/freezer from the wall outlet and waiting 30 seconds before plugging it back in. The refrigerator/freezer should immediately go into cooling mode if the thermostat is closed.
If this first test procedure fails to make the ADC initiate a defrost cycle, try the following procedure to make the ADC begin the Test Mode.
Second Test Method:
1. Disconnect the refrigerator/freezer from the wall outlet for at least 30 seconds.
2. Turn the thermostat off.
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Frigidaire has also jumped into the market with an adaptive defrost board. The fresh food section light switch and light bulb must work. To initiate a defrost cycle, open the door and push the light switch in and out 5 times within 6 seconds. The compressor and fans should shut off and the defrost heater should come on. Open the door and push the light switch in and out 5 times within 6 seconds to remove the refrigerator from the defrost mode and back into a cooling mode.



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The refrigerator/freezer defrost system can be checked by manually initiating a defrost cycle. There
are two methods of initiating the ADC Test Mode.
First Test Method:
1. Turn the thermostat off for 15 seconds.
2. Turn the thermostat on for 5 seconds.
3. Turn the thermostat off for 15 seconds.
4. Turn the thermostat on for 5 seconds.
5. Turn the thermostat off for 15 seconds.
6. Turn the thermostat on for 5 seconds.
7. Turn the thermostat off.
In 3 to 8 seconds the ADC should turn on the defrost heater (with the bimetal closed). NOTE: The test mode will terminate when the bimetal opens. If the refrigerator/freezer is already in defrost, Test Mode can be terminated by unplugging the refrigerator/freezer from the wall outlet and waiting 30 seconds before plugging it back in. The refrigerator/freezer should immediately go into cooling mode if the thermostat is closed.
If this first test procedure fails to make the ADC initiate a defrost cycle, try the following procedure to make the ADC begin the Test Mode.
Second Test Method:
1. Disconnect the refrigerator/freezer from the wall outlet for at least 30 seconds.
2. Turn the thermostat off.
3. Reconnect power to the refrigerator/freezer.
Within 3 to 8 seconds the ADC should turn on the defrost heater (with the bimetal close). If the unit fails to go into the defrost mode during this test, the problem may not be with the ADC. A defective bimetal may be the cause of the failure. The ADC will only go into a test mode if the bimetal
is closed. If the ADC senses an open bimetal it will return to the cooling mode within 3 to 8 seconds. 
HELPFUL HINT: Upon entering the Test Mode, the relay mounted on the ADC board should turn off the compressor and turn on the defrost heater. Listen for the relay to click.
� If the relay clicks one time when entering the Test Mode, check for continuity in the defrost heater.
� If the relay clicks two times, check for an open bimetal.

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